AD7190BRUZ - 24-Bit Sigma-Delta ADC with PGA | Analog Devices
MPN: AD7190BRUZ ✓ نشطAD7190BRUZ نظرة عامة
A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. It is part of the broader category of data converters, which are essential in mixed-signal systems for bridging the analog and digital domains. The AD7190's architecture provides excellent noise performance, making it ideal for precision measurement applications such as weigh scales, pressure sensors, and temperature measurement.
Key features include a programmable gain amplifier (PGA) with gains of 1, 8, 64, and 128, allowing direct connection to low-level sensors. The device offers two differential or four pseudo-differential input channels, a 24-bit resolution, and a maximum output data rate of 4.8 kHz. It also includes an internal clock, a 4-wire SPI interface, and a power-down mode for low-power applications.
The AD7190 uses a sigma-delta modulator with a digital filter, providing high-resolution conversion with inherent noise shaping. The on-chip PGA amplifies small signals before conversion, reducing the need for external amplification. The device also features a burnout current source for sensor fault detection and a reference detect function.
Typical applications include weigh scales, strain gauge transducers, pressure measurement, temperature measurement, and industrial process control. The AD7190's low noise and high resolution make it suitable for precision instrumentation and data acquisition systems.
When designing with the AD7190, ensure proper decoupling of the analog and digital supplies and use a clean reference voltage to achieve optimal performance. The SPI interface allows easy configuration of the device's registers for gain, filter, and channel selection.
بدائل مباشرة لـ AD7190BRUZ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع AD7190BRUZ (نفس عامل الشكل والبصمة) — يختلف في Package, Data Interface, RoHS Status, Input Type, Analog Supply Voltage.
AD7124-4BRUZ
تواصل لمعرفة السعر
عرض ورقة البيانات ←AD7192BRUZ
تواصل لمعرفة السعر
عرض ورقة البيانات ←AD7190WBRUZ-RL
📋 بديل مرجعي (غير موجود في الكتالوج)
AD7172-2BRUZ-RL7
تواصل لمعرفة السعر
عرض ورقة البيانات ←ADS1256IDBR
تواصل لمعرفة السعر
عرض ورقة البيانات ←AD7190BRUZ الحدود القصوى والخصائص الكهربائية
| الدقة | 24 Bit |
| Number of Channels | 2 Differential / 4 Pseudo-Differential |
| Input Type | Differential / Pseudo-Differential |
| Data Interface | SPI |
| معدل أخذ العينات | 4.8 kSPS |
| Architecture | Sigma-Delta |
| Reference Type | External |
| Analog Supply Voltage | 4.7 V to 5.25 V |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| نطاق درجة حرارة التشغيل | -40°C to +105°C |
| العلبة | 24-TSSOP |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
| PGA Gain | 1, 8, 64, 128 |
| RMS Noise | 1.5 µV at 4.7 Hz output rate |
تكوين أطراف AD7190BRUZ
| دبوس 1 | SCLK — Serial clock input for SPI |
| دبوس 2 | DIN — Serial data input for SPI |
| دبوس 3 | DOUT/RDY — Serial data output / data ready |
| دبوس 4 | CS — Chip select (active low) |
| دبوس 5 | SYNC — Synchronization input |
| دبوس 6 | AVDD — Analog power supply |
| دبوس 7 | AVDD — Analog power supply |
| دبوس 8 | REFIN1(+) — Positive reference input |
| دبوس 9 | REFIN1(-) — Negative reference input |
| دبوس 10 | AIN1(+) — Positive analog input |
| دبوس 11 | AIN1(-) — Negative analog input |
| دبوس 12 | AIN2(+) — Positive analog input |
| دبوس 13 | AIN2(-) — Negative analog input |
| دبوس 14 | AIN3(+) — Positive analog input |
| دبوس 15 | AIN3(-) — Negative analog input |
| دبوس 16 | AIN4(+) — Positive analog input |
| دبوس 17 | AIN4(-) — Negative analog input |
| دبوس 18 | PDR — Power-down reset |
| دبوس 19 | DVDD — Digital power supply |
| دبوس 20 | DGND — Digital ground |
| دبوس 21 | AGND — Analog ground |
| دبوس 22 | AGND — Analog ground |
| دبوس 23 | MCLK — Master clock input |
| دبوس 24 | MCLK — Master clock input |
التطبيقات النموذجية
AD7190BRUZ مناسب لـ 6 التطبيقs: Weigh Scales, Pressure Measurement, Temperature Measurement, Strain Gauge Transducers, Industrial Process Control, Portable Instrumentation.
Weigh Scales
The AD7190BRUZ is ideal for weigh scale applications due to its ultra-low noise and high resolution. With a PGA gain of 128, it can directly interface with load cells, providing accurate weight measurements. The device's 24-bit resolution ensures precise readings, and its low noise performance (1.5 µV RMS) minimizes measurement errors. The on-chip burnout current source helps detect sensor faults, enhancing system reliability. The SPI interface simplifies communication with microcontrollers, making it easy to integrate into weigh scale designs.
موصى به
Pressure Measurement
The AD7190BRUZ is well-suited for pressure measurement systems, such as industrial transmitters and process control. Its programmable gain amplifier allows direct connection to bridge-type pressure sensors, amplifying small differential signals. The device's high resolution and low noise ensure accurate pressure readings, even in noisy industrial environments. The internal clock and SPI interface reduce external component count, simplifying design. The wide operating temperature range (-40°C to +105°C) makes it suitable for harsh industrial conditions.
موصى به
Temperature Measurement
The AD7190BRUZ can be used in temperature measurement applications, such as thermocouple or RTD sensing. Its high resolution and low noise enable precise temperature readings, while the PGA allows amplification of small thermocouple voltages. The device's differential inputs reject common-mode noise, improving measurement accuracy. The SPI interface allows easy configuration of gain and filter settings. The burnout current source can detect open thermocouple connections, enhancing system reliability.
موصى به
Strain Gauge Transducers
The AD7190BRUZ is designed for strain gauge transducer applications, providing high-resolution conversion of small differential signals. With a PGA gain of 128, it can amplify microvolt-level signals from strain gauges, making it ideal for force and torque measurement. The device's low noise performance ensures accurate readings, and its internal clock reduces external component count. The SPI interface simplifies integration with microcontrollers, enabling real-time monitoring and control.
موصى به
Industrial Process Control
The AD7190BRUZ is suitable for industrial process control systems, such as PLCs and data acquisition modules. Its high resolution and low noise ensure accurate measurement of process variables, while the PGA allows direct connection to various sensors. The device's wide operating temperature range and robust design make it reliable in industrial environments. The SPI interface enables easy integration with industrial microcontrollers, and the power-down mode helps reduce power consumption in battery-powered systems.
موصى به
Portable Instrumentation
The AD7190BRUZ is ideal for portable instrumentation, such as handheld multimeters and data loggers, due to its low power consumption and small package. The device operates from a 2.7 V to 5.25 V digital supply, allowing battery operation. Its high resolution and low noise ensure accurate measurements, while the power-down mode extends battery life. The SPI interface simplifies connection to low-power microcontrollers, making it suitable for battery-powered designs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD7190BRUZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | AD7192BRUZ | AD7190WBRUZ-RL | AD7124-4BRUZ | AD7172-2BRUZ |
|---|---|---|---|---|---|
| Package | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Max Data Rate | 4.8 kSPS | 4.8 kSPS | 4.8 kSPS | 19.2 kSPS | 31.25 kSPS |
| Number of Channels | 2 Differential / 4 Pseudo-Differential | 2 Differential / 4 Pseudo-Differential | 2 Differential / 4 Pseudo-Differential | 4 Differential / 8 Pseudo-Differential | 2 Differential / 4 Pseudo-Differential |
| PGA Gain | 1, 8, 64, 128 | 1, 8, 64, 128 | 1, 8, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 |
| RMS Noise | 1.5 µV at 4.7 Hz | 2.1 µV at 4.7 Hz | 1.5 µV at 4.7 Hz | 1.5 µV at 1.17 Hz | 1.5 µV at 1.17 Hz |
| Analog Supply Voltage | 4.7 V to 5.25 V | 4.7 V to 5.25 V | 4.7 V to 5.25 V | 2.9 V to 3.6 V or 4.7 V to 5.25 V | 2.9 V to 3.6 V or 4.7 V to 5.25 V |
أبرز الفروقات
- Ultra-low noise performance (مقابلAD7192BRUZ)
- Automotive grade option (مقابلAD7190WBRUZ-RL)
- Lower power consumption (مقابلAD7124-4BRUZ)
ملاحظات التصميم
Use separate analog and digital power supplies to minimize noise coupling. Decouple AVDD and DVDD with 10 µF and 0.1 µF capacitors placed close to the pins. A low-noise LDO, such as the ADP3330, is recommended for the analog supply to maintain the ADC's noise performance.
Place the AD7190BRUZ on a ground plane and keep analog and digital grounds separate, connecting them at a single point. Route analog inputs away from digital traces to reduce interference. Use a clean, low-impedance reference voltage source and decouple the REFIN pins with 0.1 µF capacitors.
Ensure the reference voltage is stable and within the specified range. Avoid exceeding the absolute maximum ratings on any pin. For optimal noise performance, use a low-noise reference and keep the input signal within the common-mode range. Also, configure the digital filter correctly to achieve the desired output data rate and noise rejection.
معلومات الامتثال
RoHS compliant per distributor data. AEC-Q100 not applicable for standard version; automotive version AD7190WBRUZ-RL is qualified.
